But safety regulators say their ability to inspect the state's rail system hasn't kept pace. And in the case of railroad crossings on private land, neither the state nor the federal government has the authority to make inspections.

That's according to Jason Lewis at Washington's Utilities and Transportation Commission. He said these crossings aren't just in farm country, many are at ports, warehouses and manufacturing facilities.

“And right now no one's looking at those,” Lewis said. “So we would like to go in and look at those and require signage so people know that a crossing's there and that there is a minimal level of safety.”

Lewis said places where roads cross the tracks are especially prone to rail accidents.

The commission is also asking to increase the number of state inspectors from four to 12.

The requests are among a dozen safety recommendations made in the preliminary state report on oil transport by rail in Washington. The recommendations range from $200,000 to $4.6 million in estimated cost.